362 lines
13 KiB
Python
362 lines
13 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2013 New Dream Network, LLC (DreamHost)
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# @author: Mark McClain, DreamHost
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import uuid
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from oslo.config import cfg
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from neutron.common import constants as q_const
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from neutron.common import exceptions as q_exc
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from neutron.common import rpc as q_rpc
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from neutron.db import agents_db
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from neutron.db.loadbalancer import loadbalancer_db
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from neutron.extensions import lbaas_agentscheduler
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from neutron.openstack.common import importutils
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import rpc
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from neutron.openstack.common.rpc import proxy
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from neutron.plugins.common import constants
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from neutron.services.loadbalancer.drivers import abstract_driver
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LOG = logging.getLogger(__name__)
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ACTIVE_PENDING = (
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constants.ACTIVE,
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constants.PENDING_CREATE,
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constants.PENDING_UPDATE
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)
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AGENT_SCHEDULER_OPTS = [
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cfg.StrOpt('loadbalancer_pool_scheduler_driver',
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default='neutron.services.loadbalancer.agent_scheduler'
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'.ChanceScheduler',
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help=_('Driver to use for scheduling '
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'pool to a default loadbalancer agent')),
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]
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cfg.CONF.register_opts(AGENT_SCHEDULER_OPTS)
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# topic name for this particular agent implementation
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TOPIC_PROCESS_ON_HOST = 'q-lbaas-process-on-host'
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TOPIC_LOADBALANCER_AGENT = 'lbaas_process_on_host_agent'
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class LoadBalancerCallbacks(object):
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RPC_API_VERSION = '1.0'
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def __init__(self, plugin):
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self.plugin = plugin
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def create_rpc_dispatcher(self):
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return q_rpc.PluginRpcDispatcher(
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[self, agents_db.AgentExtRpcCallback(self.plugin)])
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def get_ready_devices(self, context, host=None):
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with context.session.begin(subtransactions=True):
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qry = (context.session.query(loadbalancer_db.Pool.id).
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join(loadbalancer_db.Vip))
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qry = qry.filter(loadbalancer_db.Vip.status.in_(ACTIVE_PENDING))
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qry = qry.filter(loadbalancer_db.Pool.status.in_(ACTIVE_PENDING))
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up = True # makes pep8 and sqlalchemy happy
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qry = qry.filter(loadbalancer_db.Vip.admin_state_up == up)
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qry = qry.filter(loadbalancer_db.Pool.admin_state_up == up)
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agents = self.plugin.get_lbaas_agents(context,
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filters={'host': [host]})
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if not agents:
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return []
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elif len(agents) > 1:
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LOG.warning(_('Multiple lbaas agents found on host %s') % host)
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pools = self.plugin.list_pools_on_lbaas_agent(context,
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agents[0].id)
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pool_ids = [pool['id'] for pool in pools['pools']]
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qry = qry.filter(loadbalancer_db.Pool.id.in_(pool_ids))
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return [id for id, in qry]
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def get_logical_device(self, context, pool_id=None, activate=True,
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**kwargs):
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with context.session.begin(subtransactions=True):
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qry = context.session.query(loadbalancer_db.Pool)
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qry = qry.filter_by(id=pool_id)
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pool = qry.one()
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if activate:
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# set all resources to active
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if pool.status in ACTIVE_PENDING:
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pool.status = constants.ACTIVE
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if pool.vip.status in ACTIVE_PENDING:
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pool.vip.status = constants.ACTIVE
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for m in pool.members:
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if m.status in ACTIVE_PENDING:
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m.status = constants.ACTIVE
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for hm in pool.monitors:
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if hm.healthmonitor.status in ACTIVE_PENDING:
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hm.healthmonitor.status = constants.ACTIVE
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if (pool.status != constants.ACTIVE
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or pool.vip.status != constants.ACTIVE):
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raise q_exc.Invalid(_('Expected active pool and vip'))
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retval = {}
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retval['pool'] = self.plugin._make_pool_dict(pool)
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retval['vip'] = self.plugin._make_vip_dict(pool.vip)
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retval['vip']['port'] = (
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self.plugin._core_plugin._make_port_dict(pool.vip.port)
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)
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for fixed_ip in retval['vip']['port']['fixed_ips']:
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fixed_ip['subnet'] = (
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self.plugin._core_plugin.get_subnet(
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context,
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fixed_ip['subnet_id']
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)
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)
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retval['members'] = [
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self.plugin._make_member_dict(m)
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for m in pool.members if m.status == constants.ACTIVE
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]
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retval['healthmonitors'] = [
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self.plugin._make_health_monitor_dict(hm.healthmonitor)
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for hm in pool.monitors
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if hm.healthmonitor.status == constants.ACTIVE
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]
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return retval
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def pool_destroyed(self, context, pool_id=None, host=None):
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"""Agent confirmation hook that a pool has been destroyed.
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This method exists for subclasses to change the deletion
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behavior.
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"""
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pass
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def plug_vip_port(self, context, port_id=None, host=None):
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if not port_id:
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return
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try:
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port = self.plugin._core_plugin.get_port(
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context,
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port_id
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)
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except q_exc.PortNotFound:
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msg = _('Unable to find port %s to plug.')
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LOG.debug(msg, port_id)
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return
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port['admin_state_up'] = True
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port['device_owner'] = 'neutron:' + constants.LOADBALANCER
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port['device_id'] = str(uuid.uuid5(uuid.NAMESPACE_DNS, str(host)))
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self.plugin._core_plugin.update_port(
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context,
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port_id,
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{'port': port}
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)
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def unplug_vip_port(self, context, port_id=None, host=None):
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if not port_id:
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return
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try:
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port = self.plugin._core_plugin.get_port(
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context,
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port_id
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)
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except q_exc.PortNotFound:
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msg = _('Unable to find port %s to unplug. This can occur when '
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'the Vip has been deleted first.')
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LOG.debug(msg, port_id)
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return
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port['admin_state_up'] = False
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port['device_owner'] = ''
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port['device_id'] = ''
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try:
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self.plugin._core_plugin.update_port(
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context,
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port_id,
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{'port': port}
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)
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except q_exc.PortNotFound:
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msg = _('Unable to find port %s to unplug. This can occur when '
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'the Vip has been deleted first.')
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LOG.debug(msg, port_id)
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def update_pool_stats(self, context, pool_id=None, stats=None, host=None):
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self.plugin.update_pool_stats(context, pool_id, data=stats)
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class LoadBalancerAgentApi(proxy.RpcProxy):
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"""Plugin side of plugin to agent RPC API."""
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BASE_RPC_API_VERSION = '1.0'
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# history
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# 1.0 Initial version
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# 1.1 Support agent_updated call
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def __init__(self, topic):
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super(LoadBalancerAgentApi, self).__init__(
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topic, default_version=self.BASE_RPC_API_VERSION)
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def reload_pool(self, context, pool_id, host):
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return self.cast(
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context,
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self.make_msg('reload_pool', pool_id=pool_id, host=host),
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topic='%s.%s' % (self.topic, host)
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)
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def destroy_pool(self, context, pool_id, host):
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return self.cast(
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context,
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self.make_msg('destroy_pool', pool_id=pool_id, host=host),
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topic='%s.%s' % (self.topic, host)
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)
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def modify_pool(self, context, pool_id, host):
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return self.cast(
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context,
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self.make_msg('modify_pool', pool_id=pool_id, host=host),
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topic='%s.%s' % (self.topic, host)
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)
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def agent_updated(self, context, admin_state_up, host):
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return self.cast(
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context,
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self.make_msg('agent_updated',
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payload={'admin_state_up': admin_state_up}),
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topic='%s.%s' % (self.topic, host),
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version='1.1'
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)
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class HaproxyOnHostPluginDriver(abstract_driver.LoadBalancerAbstractDriver):
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def __init__(self, plugin):
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self.agent_rpc = LoadBalancerAgentApi(TOPIC_LOADBALANCER_AGENT)
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self.callbacks = LoadBalancerCallbacks(plugin)
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self.conn = rpc.create_connection(new=True)
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self.conn.create_consumer(
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TOPIC_PROCESS_ON_HOST,
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self.callbacks.create_rpc_dispatcher(),
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fanout=False)
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self.conn.consume_in_thread()
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self.plugin = plugin
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self.plugin.agent_notifiers.update(
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{q_const.AGENT_TYPE_LOADBALANCER: self.agent_rpc})
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self.pool_scheduler = importutils.import_object(
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cfg.CONF.loadbalancer_pool_scheduler_driver)
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def get_pool_agent(self, context, pool_id):
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agent = self.plugin.get_lbaas_agent_hosting_pool(context, pool_id)
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if not agent:
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raise lbaas_agentscheduler.NoActiveLbaasAgent(pool_id=pool_id)
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return agent['agent']
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def create_vip(self, context, vip):
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agent = self.get_pool_agent(context, vip['pool_id'])
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self.agent_rpc.reload_pool(context, vip['pool_id'], agent['host'])
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def update_vip(self, context, old_vip, vip):
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agent = self.get_pool_agent(context, vip['pool_id'])
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if vip['status'] in ACTIVE_PENDING:
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self.agent_rpc.reload_pool(context, vip['pool_id'], agent['host'])
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else:
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self.agent_rpc.destroy_pool(context, vip['pool_id'], agent['host'])
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def delete_vip(self, context, vip):
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self.plugin._delete_db_vip(context, vip['id'])
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agent = self.get_pool_agent(context, vip['pool_id'])
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self.agent_rpc.destroy_pool(context, vip['pool_id'], agent['host'])
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def create_pool(self, context, pool):
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if not self.pool_scheduler.schedule(self.plugin, context, pool):
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raise lbaas_agentscheduler.NoEligibleLbaasAgent(pool_id=pool['id'])
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# don't notify here because a pool needs a vip to be useful
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def update_pool(self, context, old_pool, pool):
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agent = self.get_pool_agent(context, pool['id'])
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if pool['status'] in ACTIVE_PENDING:
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if pool['vip_id'] is not None:
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self.agent_rpc.reload_pool(context, pool['id'], agent['host'])
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else:
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self.agent_rpc.destroy_pool(context, pool['id'], agent['host'])
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def delete_pool(self, context, pool):
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agent = self.plugin.get_lbaas_agent_hosting_pool(context, pool['id'])
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if agent:
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self.agent_rpc.destroy_pool(context, pool['id'],
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agent['agent']['host'])
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self.plugin._delete_db_pool(context, pool['id'])
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def create_member(self, context, member):
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agent = self.get_pool_agent(context, member['pool_id'])
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self.agent_rpc.modify_pool(context, member['pool_id'], agent['host'])
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def update_member(self, context, old_member, member):
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# member may change pool id
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if member['pool_id'] != old_member['pool_id']:
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agent = self.plugin.get_lbaas_agent_hosting_pool(
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context, old_member['pool_id'])
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if agent:
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self.agent_rpc.modify_pool(context,
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old_member['pool_id'],
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agent['agent']['host'])
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agent = self.get_pool_agent(context, member['pool_id'])
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self.agent_rpc.modify_pool(context, member['pool_id'], agent['host'])
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def delete_member(self, context, member):
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self.plugin._delete_db_member(context, member['id'])
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agent = self.get_pool_agent(context, member['pool_id'])
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self.agent_rpc.modify_pool(context, member['pool_id'], agent['host'])
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def update_health_monitor(self, context, old_health_monitor,
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health_monitor, pool_id):
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# monitors are unused here because agent will fetch what is necessary
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agent = self.get_pool_agent(context, pool_id)
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self.agent_rpc.modify_pool(context, pool_id, agent['host'])
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def create_pool_health_monitor(self, context, healthmon, pool_id):
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# healthmon is not used here
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agent = self.get_pool_agent(context, pool_id)
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self.agent_rpc.modify_pool(context, pool_id, agent['host'])
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def delete_pool_health_monitor(self, context, health_monitor, pool_id):
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self.plugin._delete_db_pool_health_monitor(
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context, health_monitor['id'], pool_id
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)
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# healthmon_id is not used here
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agent = self.get_pool_agent(context, pool_id)
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self.agent_rpc.modify_pool(context, pool_id, agent['host'])
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def create_health_monitor(self, context, health_monitor):
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pass
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def stats(self, context, pool_id):
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pass
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